General Science- Dhwani Tarange Nahin Chal Sakti Hai ?

Q.10482: ध्वनि तरंगे नहीं चल सकती है ?
A.
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ध्वनि तरंगे नहीं चल सकती है ? General Science in hindi,   Vayu Me question answers in hindi pdf  Lohe Me questions in hindi, Know About Jal Me General Science online test General Science notes in hindi quiz book    Nirvaat Me

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